Putting on and sizing N 95 masks (for use during influenza outbreaks)This is a link to a CDC/HHS video on how to correctly size your N 95 mask, how to don and how to doff the N 95 mask. Remember, no one action will prevent you becoming infected from any infectious agent (including the H1N1 virus). Rather, it is a culmination of many different actions. For example, wearing N 95 masks in conjunction with rigorous attention to hygiene procedures and maintaining a healthy lifestyle will lessen the chance of infection.